F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 63/02 (2006.01) F16H 61/02 (2006.01) F16H 59/08 (2006.01) F16H 61/684 (2006.01) F16H 61/70 (2006.01)
Patent
CA 2113289
A powershift transmission includes a plurality of clutches, including a final or directional set of clutches. The clutches are controlled by electro-hydraulic direct acting valves and two electro-hydraulic proportional or pressure modulating valves. The pressure modulating valves modulate the pressure supplied to the direct acting valves associated with the three directional clutches. Vehicle deceleration during a shuttle shift is achieved by releasing (unpressurizing) all clutches, then gradually pressurizing only two clutches in the final or directional set.
Transmission automatique comportant plusieurs embrayages, dont un ensemble d'embrayages finals ou directionnels. Les embrayages sont commandés par des électrovalves hydrauliques à action directe et par deux électrovalves hydrauliques proportionnelles ou régulatrices de pression. Les valves modulatrices de pression règlent la pression fournie aux valves à action directe associées aux trois embrayages de marche. La décélération du véhicule pendant un changement de vitesse est effectuée par débrayage (dépressurisation) et par augmentation graduelle de la pression sur seulement deux embrayages dans l'ensemble des embrayages finals ou directionnels.
Borden Ladner Gervais Llp
Deere & Company
LandOfFree
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